Textile device



April 9, 1952 E. R. STAHL 2,594,509

TEXTILE DEVICE Filed Oct. 2, 1948 IN VEN TOR.

E 1g. 5 ELMER RSTAHL ATTORNEYS Tug -2, y.

Patented Apr. 29, 1952 TEXTILE DEVICE Elmer R. St'a'hl, Meyersdale, Pa., assignorto Gelanese' Corporation. of America, a corporation of Delaware Application October 2, 1948, Serial No. 52,511-

6 Claims. (01. 242-18) This invention relates to a textile device and relates more particularly to an attachment for twister cheesersand like yarn winding machines wherein the yarn package being wound is rotated so as to takeup the yarn by means of a drive roll frictionally engaged by and in surface contact with the yarn windings on the yarn package being formed, for damping any undesirable vertical movement or oscillation of the yarn package during yarn winding operations.

in forming yarn packages employing twister cheesers and like yarn winding machines, whereyarn is withdrawn from a supply package which is rotatably driven at high speed about a vertical axis and taken up on a yarn package such as a tube, rotating freely about a horizontal axis so that a twist is inserted in the yarn, the means normally employed for driving the horizontally disposed take-up package or tube comprises a horizontal cork-covered drive roller. The take-up package usually rests upon the corkcovered roller and the resulting friction between the surface of the cork-covered drive roller and the yarn windings on the take-up package resting thereon causes the latter to be rotated about its axisat a constant peripheral speed. The twist inserted in the yarn by this operation is governed by the relationship between the rotational speed of the vertical supply package and the speed at which the take up package is driven. Whenthe tube employed for the take-up package is perfectly cylindrical little difilculty is normally encountered in the winding operation. However, during service many of the take-up tubes; which are formed of metal if theyarnswound thereon are to be subjected to a subsequent liquid treatmerit in package form, areslightly bent out of round. Since the metal take-up tubes are usually fermed of stainless steel, to discard every tube which is even slightly out of round is prohibitively expensive. When the take-up tube is rotated atlow speeds by thedrive roller little difiiculty is encountered with a slightly out of round tube, but when the take-up tube is driven at high speed, the tube, now having yarn windings thereon, quickly develops amarked oscillation.- The resulting vibration, as theyarn pack age fills and bounces on the drive roller, becomes quite aserious matter and a rather lop-sided, out of balance yarn package is obtained. Weighting' the take-up tube to minimize such vibration is of some. help but is impractical where a loosely wound. yarn package suitable for subsequent liq-' uid treatment is desired.

It is, therefore, an important object of this invention to provide a novel damping attachment,- suitable for use in connection with'a twister cheeser or like winding and twisting apparatus,

for minimizing any vertical oscillationor bounce" of the yarn package being formed when a slightly'-'- out of round take-up tribe is employed.

tachmen't for" twister heese'r's and like sive to maintain and which permits the maxi mum use of the operative elements normally" present on said winding device's.

Yet another objectofinvention is the pro vision of a damping attachment for twister" cheesers and like Winding devices whieh will per:

mit perfectly round packages to be formed even though the tube upon which the yarns are wound are not perfectly round.

A further object of my invention is the production of yarn packages of predetermined density by the controlled damping of yarn pack age oscillations.

Other objects of this invention will ap ear hereinafter from the following detailed" description and the accompanyin drawing;

In the drawing,

Fig. 1 is a perspective View of the novel damp ing attachment of my invention mounted (in a twister eheesei yarn winding device; some or the-- elements of the twister eheeser being shown in broken lines;

Fig. 2 is a sectional View of the lower portion of said damping attachment taken along the line 22 in Fig. 1 in the direction of the arrows;

Fig. 3 is a sectional view of the same portion of the damping attachment that is shown in Fig'. 2 with. the several parts in raised position; and

Fig. 4 is a detail view of the upper portion orthe damping attachment.

Like reference numerals indicate like parts" formed by taking up yarn from a suitablesupply package (not shown). Tube [2 is rotated ona spindle I 2 by frictional surface contact with a suitable drive roller l3 carried by a shaft M" which is driven at high speed by suitable driving means (not show m Spindle l2" and tube I?- are supported by a bracket l5 which is pivotally" mounted on a U-shaped bracket l6 by means of a pin I1, bracket l6 being suitably fixed to a beam l8 which is part of the machine frame. As yarn package l increases in diameter, bracket I gradually rotates about pivot pin I! to accommodate the increase in size while maintaining the external yarn windings II in contact with the surface of drive roller l3. Should the yarn supply to package [0 become exhausted or should the yarn break, it is customary to provide a throwout mechanism which disengages the yarn supply package I0 from the surface of drive roller l3 until the break can be tied in or a new supply provided. By the action of the throw-out mechanism degradation of the surface yarn windings by excessive abrasion is avoided. The throw-out mechanism (not shown) is normally operated, in part, by a slowly rotating driven shaft I9. This latter shaft actuates an eccentric cam arrangement generally indicated by reference numeral 20, which, through a rod 2| and a cap 22, raises and lowers a bar 23. The elements cooperating with bar 23 and constituting the remainder of the throw-out mechanism are not shown since they do not form part of my invention. However, I do utilize the shaft I9, eccentric 20 and reciprocating bar 23 as essential operative elements in the novel damping attachment of my invention.

In order to dampen any excessive oscillation of yarn package [0 and bracket l5 during winding operations, the free pivotal movement of bracket l5 must be restricted at definite intervals. The desired restriction is effected through the action of a rod 24 which is fixed to bracket [5 by means of a bifurcated link 25 which is provided with a pin 26 to allow some pivotal movement between rod 24 and link 25. Rod 24 passes under a grooved guide bracket 21 and is provided with a collar 28 at the end thereof which controls the maximum forward movement permitted. Guide bracket 21 is attached to a supporting member, generally indicated by reference numeral 29, fixed to bars 30, which bars constitute part of the machine frame.

Supporting member 29 also carries a perforated guide bracket 3| for guiding a reciprocating rod 32. The upper extremity of rod 32 is provided with a rounded tip 33 and has adjustably mounted thereon a collar 34, said collar being maintained in adjusted positions by a set screw 35. Rod 32 also carries a slidably mounted sleeve 36 at the foot thereof, which sleeve is held thereon by a removable pin 31 which passes through rod 32. Sleeve 36 is normally pressed against pin 31 by an expansible coil spring 38, one end of which bears against collar 34 and the other end on sleeve 36.

During the usual winding and twisting operation at high speed whereby yarn package [0 is formed, some degree of oscillation or bounce of said yarn package normally occurs and especially, as stated, when the take-up tube I 2 is slightly out of round. Such oscillation causes bracket l5 to move up and down and rotate about pin [1. This movement slides rod 24 back and forth in grooved bracket 21 and at the start of the package winding operation the oscillations are slight. If movement of the yarn package is undamped a substantial amount of vibration results, the package becomes lop-sided and out of balance, which effect increases as the yarn package grows. Damping of this movement is effected, however, by the action of my novel device in the following man'- ner.

Thus, as shaft I9 rotates, the rotation of eecentric cam 20 reciprocates rod 2| and cap 22. This action causes bar 23 to be raised and lowered since sleeve 36 is centered over bar 23. As bar 23 rises it strikes sleeve 36, as shown in Fig. 3, compressing spring 38 and lifting rod 32. Rod 32 moves upward through guide bracket 3|, thus causing cap 33 to strike rod 24, which is moving back and forth in groove bracket 21 and to hold it by friction. When cap 33 strikes rod 24, the latter is nipped between cap 33 and grooved bracket 21, as shown in Fig. 4, and the oscillation of yarn package I0 is momentarily damped. Shaft l9 can be rotated at different speeds so that this nipping and damping action may be caused to .take place for greater or lesser intervals, as is necessary or desirable.

My novel damping attachment enables yarn packages of wide extremes of density to be formed by varying the time factor involved in nipping the rod 24. For example, to increase the yarn package density the length of time during which the positive nip function is increased in relationship to the free period, whereas to decrease package density the length of time during which the positive nip is in effect is decreased, thus increasing the proportionate time during which the yarn package It) floats freely on the drive roller l3.

Furthermore, as the first yarn is wound on a tube which is out of round with the dampener attachment in operation, the high points only of the package are subjected to an increased pressure. Consequently the package of yarn soon becomes round and concentric with the axis of rotation. Because this action continues, the package once round, remains perfectly round as long as it runs.

It is to be understood that the foregoing detailed description is given merely by way of illustration and that many variations may be made therein without departing from the spirit of my invention.

Having described my invention, what I desire to secure by Letters Patent is:

1. In a yarn package winding device comprising a freely rotatable yarn package and driving means adapted to drive said yarn package by frictional engagement with yarn on the surface thereof, yarn package supporting means adapted to pivot freely and permit the distance between the axis of the yarn package and the axis of the driving means to increase as the yarn package windings build up, means, including a clamping device, operatively connected to said yarn package supporting means and means for intermittently operating said clamping device for intermittently halting pivotal movement of the yarn package supporting means while permitting continued rotation of the yarn package.

2. In a yarn package winding device comprising a freely rotatable yarn package and driving means adapted to drive said yarn package by frictional engagement with yarn on the surface thereof, a rotatable spindle adapted to receive said yarn package, a bracket carrying said spindles and pivotally mounted for free movement to permit the distance between the spindle and the axis of the driving means to increase as the yarn package windings build up, means including a clamping device, operatively connected to said bracket, and means for intermittently operating said clamping device for intermittently halting pivotal movement of said bracket,

spindle and yarn package while permitting coritinued rotation of the yarn package.

the pivoting of said bracket, means, including a clamping device, operatively connected to said bracket, and means for intermittently operating said clamping device for intermittently gripping said rod and halting pivotal movement of the bracket, spindle and yarn package while permitting continued rotation of the yarn package.

4. In a yarn package winding device comprising a freely rotatable y,arn package and driving means adapted to drive said yarn package by frictional engagement with yarn on the surface thereof, a rotatable spindle adapted to receive said yarn package, a bracket carrying said spindle and pivotally mounted for free movement to permit the distance between the spindle and the axis of the driving means to increase as the yarn package windings build up, a rod linked to the bracket and moving longitudinally with the pivoting of said bracket, a guide grooved to re-' ceive said rod, a second rod adapted to register on the first mentioned rod where it seats in the grooved guide, and means for reciprocating the second rod to strike the first mentioned rod, grip the same intermittently and halt pivotal movement of the bracket, spindle and yarn package while permitting continued rotation of the yarn package.

5. In a yarn package winding device comprising a freely rotatable yarn package and driving means adapted to drive said yarn package by frictional engagement with yarn on the surface thereof, a rotatable spindle adapted to receive said yarn package, a bracket carrying said spindle and pivotally mounted for free movement to perceive said rod, a second rod adapted to register on the first mentioned rod where it seats in the grooved guide, and lifting means including an eccentric cam cooperating with said second rod for reciprocating the second rod causing it to strike the first mentioned rod, grip the same intermittently and halt pivotal movement of the bracket, spindle and yarn package while permitting continued rotation of the yarn package.

6. In a yarn package winding device comprising a freely rotatable yarn package and driving means adapted to drive said yarn package by frictional engagement with yarn on the surface thereof, a rotatable spindle adapted to receive said yarn package, a bracket carrying said spindle and pivotally mounted for free movement to permit the distance between the spindle and the axis of the driving means to increase as the yarn package windings build up, a rod linked to the bracket and moving longitudinally with the pivoting of said bracket, a guide grooved to receive said rod, a second rod adapted to register on the first mentioned rod where it seats in the grooved guide, and lifting means including an eccentric cam cooperating with said second rod, a collar fixed to the foot of the second rod, a slidable sleeve below the collar, and a spring intermediate of said collar and slidable sleeve, the rotation of said eccentric cam acting to press on said slidable, spring-loaded sleeve to reciprocate the second rod causing it to strike the firstmentioned rod intermittently and halt pivotal movement of the bracket, spindle and yarn package while permitting continued rotation of the yarn package.

ELMER. R. STAHL.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Borton Aug. 7, 1945 

